Peterbilt 379 Chrome Stacks & Tops

Frequently Asked Questions About Peterbilt 379 Chrome Stacks & Tops

What exactly are chrome stacks and tops, and what do they do?

Chrome stacks refer to the exhaust stack pipes that run vertically along the cab of your Peterbilt 379, directing exhaust gases up and away from the truck. The "tops" are the curved or angled cap pieces that attach to the top of the stack pipe, controlling the direction the exhaust exits. Together, they form the visible exhaust system components that combine function with the classic chrome look many owner-operators want on their rig.

Will these stacks and tops fit my specific Peterbilt 379 exhaust setup?

Fitment depends on the diameter of your existing exhaust pipe (commonly 5 inch or 6 inch), the stack length, and whether your truck uses a straight or curved top design. Before ordering, measure your current pipe diameter and check the listed dimensions on each product page. If you are unsure, our team can help confirm compatibility based on your truck's exhaust configuration.

What finish or material options are available, and how do they hold up?

Most stacks and tops are available in chrome-plated steel or stainless steel construction. Chrome offers a bright, mirror-like finish that many customers prefer for looks, while stainless steel tends to resist corrosion and heat discoloration better over time, especially in daily-driver applications. Regular washing and occasional polishing will help maintain shine on either option, particularly since exhaust heat and road grime can cause discoloration over time.

Are these stacks and tops legal for on-road use, and do they affect emissions?

Chrome stacks and tops are aftermarket exterior exhaust components and do not alter your engine's emissions system or aftertreatment components. However, regulations on stack height, smoke opacity, and exhaust routing can vary by state and by whether the truck is used commercially. It is a good idea to check your local and DOT requirements to confirm your setup stays compliant.

Can I install these myself, or should I have a shop do it?

Many owner-operators install chrome stacks and tops themselves using basic tools, especially if you are replacing an existing stack with the same diameter and mounting style. The process typically involves securing the stack to the existing exhaust piping with clamps and mounting brackets, then attaching the top. If your setup requires cutting, welding, or reworking the exhaust routing, having a shop handle the install is recommended to ensure a proper seal and secure fit.